13019309 has 2 divisors, whose sum is σ = 13019310. Its totient is φ = 13019308.

The previous prime is 13019273. The next prime is 13019323. The reversal of 13019309 is 90391031.

13019309 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11526025 + 1493284 = 3395^2 + 1222^2 .

It is a cyclic number.

It is not a de Polignac number, because 13019309 - 2⁸ = 13019053 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is equal to p₈₅₀₄₄₅ and since 13019309 and 850445 have the same sum of digits, it is a Honaker prime.

It is a plaindrome in base 15.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13019359) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6509654 + 6509655.

It is an arithmetic number, because the mean of its divisors is an integer number (6509655).

Almost surely, 2^13019309 is an apocalyptic number.

It is an amenable number.

13019309 is a deficient number, since it is larger than the sum of its proper divisors (1).

13019309 is an equidigital number, since it uses as much as digits as its factorization.

13019309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 729, while the sum is 26.

The square root of 13019309 is about 3608.2279584306. The cubic root of 13019309 is about 235.2498263654.

The spelling of 13019309 in words is "thirteen million, nineteen thousand, three hundred nine".